<template>
  <el-menu
    :default-active="activeMenu"
    mode="horizontal"
    :ellipsis="false"
    @select="handleSelect"
  >
    <template v-for="(item, index) in topMenus">
      <el-menu-item v-if="index < visibleNumber" :key="index" :style="{'--theme': theme}" :index="item.path">
        <svg-icon
          v-if="item.meta && item.meta.icon && item.meta.icon !== '#'"
          :icon-class="item.meta.icon"
        />
        {{ item.meta.title }}
      </el-menu-item>
    </template>

    <!-- 顶部菜单超出数量折叠 -->
    <el-sub-menu v-if="topMenus.length > visibleNumber" :style="{'--theme': theme}" index="more">
      <template #title>更多菜单</template>
      <template v-for="(item, index) in topMenus">
        <el-menu-item
          v-if="index >= visibleNumber"
          :key="index"
          :index="item.path"
        >
          <svg-icon
            v-if="item.meta && item.meta.icon && item.meta.icon !== '#'"
            :icon-class="item.meta.icon"
          />
          {{ item.meta.title }}
        </el-menu-item>
      </template>
    </el-sub-menu>
  </el-menu>
</template>

<script setup>
import { constantRoutes } from '@/router';
import { isHttp } from '@/utils/validate';
import useAppStore from '@/store/modules/app';
import useSettingsStore from '@/store/modules/settings';
import usePermissionStore from '@/store/modules/permission';

// 顶部栏初始数
const visibleNumber = ref(null);
// 当前激活菜单的 index
const currentIndex = ref(null);
// 隐藏侧边栏路由
const hideList = ['/index', '/user/profile'];

const appStore = useAppStore();
const settingsStore = useSettingsStore();
const permissionStore = usePermissionStore();
const route = useRoute();
const router = useRouter();

// 主题颜色
const theme = computed(() => settingsStore.theme);
// 所有的路由信息
const routers = computed(() => permissionStore.topbarRouters);

// 顶部显示菜单
const topMenus = computed(() => {
	const topMenus = [];
	routers.value.forEach((menu) => {
		if (menu.hidden !== true) {
			// 兼容顶部栏一级菜单内部跳转
			if (menu.path === '/') {
				topMenus.push(menu.children[0]);
			} else {
				topMenus.push(menu);
			}
		}
	});
	return topMenus;
});

// 设置子路由
const childrenMenus = computed(() => {
	const childrenMenus = [];
	routers.value.forEach((router) => {
		// eslint-disable-next-line guard-for-in
		for (const item in router.children) {
			if (router.children[item].parentPath === undefined) {
				if(router.path === '/') {
					router.children[item].path = '/' + router.children[item].path;
				} else {
					if(!isHttp(router.children[item].path)) {
						router.children[item].path = router.path + '/' + router.children[item].path;
					}
				}
				router.children[item].parentPath = router.path;
			}
			childrenMenus.push(router.children[item]);
			
		}
	});
	return constantRoutes.concat(childrenMenus);
});

// 默认激活的菜单
const activeMenu = computed(() => {
	const path = route.path;
	let activePath = path;
	if (path !== undefined && path.lastIndexOf('/') > 0 && hideList.indexOf(path) === -1) {
		const tmpPath = path.substring(1, path.length);
		activePath = '/' + tmpPath.substring(0, tmpPath.indexOf('/'));
		if (!route.meta.link) {
			appStore.toggleSideBarHide(false);
		}
	} else if(!route.children) {
		activePath = path;
		appStore.toggleSideBarHide(true);
	}
	activeRoutes(activePath);
	return activePath;
});

function setVisibleNumber() {
	const width = document.body.getBoundingClientRect().width / 3;
	visibleNumber.value = parseInt((width / 85),10);
}

function handleSelect(key, keyPath) {
	currentIndex.value = key;
	const route = routers.value.find(item => item.path === key);
	if (isHttp(key)) {
		// http(s):// 路径新窗口打开
		window.open(key, '_blank');
	} else if (!route || !route.children) {
		// 没有子路由路径内部打开
		const routeMenu = childrenMenus.value.find(item => item.path === key);
		if (routeMenu && routeMenu.query) {
			const query = JSON.parse(routeMenu.query);
			router.push({ path: key, query: query });
		} else {
			router.push({ path: key });
		}
		appStore.toggleSideBarHide(true);
	} else {
		// 显示左侧联动菜单
		activeRoutes(key);
		appStore.toggleSideBarHide(false);
	}
}

function activeRoutes(key) {
	const routes = [];
	if (childrenMenus.value && childrenMenus.value.length > 0) {
		childrenMenus.value.forEach((item) => {
			if (key == item.parentPath || (key == 'index' && item.path == '')) {
				routes.push(item);
			}
		});
	}
	if(routes.length > 0) {
		permissionStore.setSidebarRouters(routes);
	} else {
		appStore.toggleSideBarHide(true);
	}
	return routes;
}

onMounted(() => {
	window.addEventListener('resize', setVisibleNumber);
});
onBeforeUnmount(() => {
	window.removeEventListener('resize', setVisibleNumber);
});

onMounted(() => {
	setVisibleNumber();
});
</script>

<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}

.topmenu-container.el-menu--horizontal > .el-menu-item.is-active, .el-menu--horizontal > .el-sub-menu.is-active .el-submenu__title {
  border-bottom: 2px solid #{'var(--theme)'} !important;
  color: #303133;
}

/* sub-menu item */
.topmenu-container.el-menu--horizontal > .el-sub-menu .el-sub-menu__title {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}

/* 背景色隐藏 */
.topmenu-container.el-menu--horizontal>.el-menu-item:not(.is-disabled):focus, .topmenu-container.el-menu--horizontal>.el-menu-item:not(.is-disabled):hover, .topmenu-container.el-menu--horizontal>.el-submenu .el-submenu__title:hover {
  background-color: #ffffff !important;
}

/* 图标右间距 */
.topmenu-container .svg-icon {
  margin-right: 4px;
}

/* topmenu more arrow */
.topmenu-container .el-sub-menu .el-sub-menu__icon-arrow {
  position: static;
  vertical-align: middle;
  margin-left: 8px;
  margin-top: 0px;
}
</style>
